Malicious PDF — malware analysis report

Static analysis result for SHA-256 119ac3b1084ef421…

MALICIOUS

PDF

82.1 KB Created: 2021-07-21 04:11:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 271ff6f2e895b0bea6cde6ea1b2d7c96 SHA-1: 8ffceef894134ff002831c02fee0e2b51fa32e2b SHA-256: 119ac3b1084ef42199e6d0158786800a5a0f01d292b4db789eddacaaf3c08d56
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to redirect users to potentially malicious content. The ClamAV detection and ML classifier strongly suggest a phishing or malware distribution intent. No scripts were extracted, but the structure and URL patterns are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ef053a2ef2---tisixijuxifof.pdf In PDF document text
    • http://zuche0551.com/upload/file/54379040278.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/c16bf55094b0fd8bb27148a4e385b9b1/91295146645.pdfIn PDF document text
    • http://www.gc-antey.ru/ckfinder/userfiles/files/gudifijekifipokavekal.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16074939682ca2---89189506305.pdfIn PDF document text
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073703005b75---91510599899.pdfIn PDF document text
    • https://dalnoboy.com/data/filestorage/upload/files/musuzila.pdfIn PDF document text
    • http://seabeachthailand.com/UserFiles/file/80801572938.pdfIn PDF document text
    • http://acecaalcoy.com/userfiles/file/41428028860.pdfIn PDF document text
    • http://www.pilonidalsinus.gen.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608459658d786---tojenoravepipodofeseri.pdfIn PDF document text
    • http://valkexclusief.reviews/app/webroot/files/userfiles/files/19176506061.pdfIn PDF document text
    • http://geologocarmignani.com/userfiles/files/kukodujojeresemapi.pdfIn PDF document text
    • http://irollee.com/userfiles/file/pibapakikojozukulib.pdfIn PDF document text
    • http://stepasidemedical.com/images/uploads/file/sazakovapim.pdfIn PDF document text
    • https://avigailpekelman.com/sites/default/files/file/68517820735.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bed51de9fc---pazimuwofezemuvafuriliru.pdfIn PDF document text
    • http://ngoinvest.com/uploads/ckfinder/files/44540547549.pdfIn PDF document text
    • http://jonkmp.nl/img/cms/file/wenadogezeni.pdfIn PDF document text
    • http://kbo.pl/ckfinder/userfiles/files/kosesevase.pdfIn PDF document text
    • http://diysmart.net/userfiles/file/nixifatixanugerewafom.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/honr8k2qt06khka87k1rvedu84/24275838414.pdfIn PDF document text
    • https://mymango.ru/wp-content/plugins/super-forms/uploads/php/files/920d39e31f6a005a020373d3940ecfa2/83040483875.pdfIn PDF document text
    • https://bawwabatrizq.com/userfiles/file/pofudoso.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=simple+survival+house+minecraftPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF74 16444 bytes
SHA-256: 9daffcbb4a42d0eb6f12fb09d3f79b3739320aed8e2a0748d99c1e4bc5f14676
font_01_sfnt_off000109e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109E8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000121ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121FF 10984 bytes
SHA-256: b280f8d70c645c4e4c3ef114d97d0b0410be491e3baf6ac7fa4dcf8898917b2a

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